An expansion joint for connecting pipe ends includes a fluorocarbon polymer tube having a reinforcing fabric embedded within it. The ends of the tube have radially extending flanges which are adapted to be in sealing relationship with the pipe ends. The tube has an annular arch spaced between the tube flanges. Metal stub ends having a radially extending flange at one end are in abutting relation to the tube flanges, thereby providing support and improved sealing from the otherwise flexible tube flange. A rubber backing is fastened to the fabric embedded in the tube. A back-up ring having peripheral fastener apertures is disposed about the tube at each end of the tube. The tube flanges are compressed between the back-up ring and pipe flange when the latter two are bolted together. A washer, spaced between the backup ring and rubber back permits the ring to be rotated about the tube to allow alignment of peripheral ring fastener apertures with corresponding fastener apertures in the pipe flange.